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Require at least one child entry in batch to have specified value for selected field

GOAL

This code snippet enforces validation on a Gravity Forms Nested Form field, ensuring that at least one child entry in a batch contains a specific value in a selected field. If no child entry meets the requirement, the form submission is blocked, and a validation message is displayed.

CONFIGURATION

  • $forms:
    • nested_field_id: ID of the Nested Form field on the parent form
    • child_field_id: ID of the field on the child form to check
    • required_value: String value required in at least one child entry
    • message: Validation message to show if requirement is not met
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